Last night my PC froze up so I just reset the machine. As it was booting up the was no signal to my monitor so I reset the machine again. Once again there was no signal to the monitor and after about 10 seconds the machine powered itself off. I have encountered this porblem before and it turned out the graphcs card had died. But this time the POST LCD screen on my Asus Crosshair motherboard has corrupted looking like a damaged digital watch and stays in this state without giving any POST info on startup. Could this mean the motherboard has died?
The first thing I would suspect is the PSU. Of course, when a PSU fails utterly, they have a nasty habbit of taking out other components with them. What's the make and model of your PSU?
Thanks for the reply. My PSU is a Antec Truepower Quattro 850w After more experimenting this is my view also. The psu has performed amazingly for about 2 years and the problem hasnt occured as a result of any tinkering. I did notice some red lights now showing on the gpu (radeon HD 4870) and discovered that they indicated that the power cables were disconnected. They werent so i guessed that thepower supply wasnt giving power to it...yet the fan still runs on it. The fan also speeds up to max speed when I try to boot up the machine but does not slow down as it used to...and the heatsink is cold to touch. As for it taking other componants with it the corrupted lcd post display on the mobo makes me think the mobo is fried. All the fans in the machine run as normal (aside from the gpu fan). I tried a spare graphics card in the machine also but to no effect.
Try a different PSU and see if it posts in that case. I've had bad luck with Antec the last few years, and a few even caught fire in the last PSU shootout I read.
Finally got hold of a new psu to try but sadly the problem remains...also theres no indication of HDD access from the HDD Led. Looks like the mobo is dead "sigh"
don't give up yet, swop out the essentials, start with memory, one module at a time, then graphics card, psu, cpu fan in some cases. If still no post it's the board could be any essential controllers, mosfets voltage regualors, power caps also bios chip, but from what you where saying it's power off randomly makes me think it's something to do with the mosfets because you've already swopped out the psu. so most likely dead board. But yet again it is Asus, prone to crap out.
